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Best way to generate gears in Alibre Design Expert ?

Discussion in 'Using Alibre Design' started by MikeD, Aug 17, 2008.

  1. MikeD

    MikeD Member

    Hi,

    Just looking for some tips as to how best to generate gears in ADE ? I will want to use Alibre Motion to simulate the finishes assembly so that's an issue.

    Thanks,

    Mike
     
  2. wathavy4

    wathavy4 Alibre Super User

    Attached Files:

  3. NateLiqGrav

    NateLiqGrav Alibre Super User

    Are you going to need custom gears or to build your own gears? If not then I'd suggest downloading them from a manufacturer catalog.
     
  4. indesign

    indesign Alibre Super User

    Man if I get the time this would be great to create an addon. Maybe I should start looking into it but it would be pretty intense to get it right with tolerance values and all.
     
  5. OTE_TheMissile

    OTE_TheMissile Alibre Super User

    You'd be doing a service to humanity though...ugh, I positively HATED the Gears chapter of my Mechanisms class in college
     
  6. Ralf

    Ralf Alibre Super User

    Please give us some weeks/days :wink:
     

    Attached Files:

  7. OTE_TheMissile

    OTE_TheMissile Alibre Super User

    How do you say "Friggin' Sweet!" in German? 8)
     
  8. Ralf

    Ralf Alibre Super User

  9. indesign

    indesign Alibre Super User

    Now can you do that with dimension over pins? That would be getting very good. I could take some snap shots of another cad software that does this if it would help for input types and involute modifications.
     
  10. Ralf

    Ralf Alibre Super User

    Number of gear "teeth" z1 and z2
    z1 = Pinion size = small gear
    z2 = Wheel size = large gear

    mn = ( Modul Normal ) mt = mn/cosß
    (beta) ß = 0 and the Modul is m ( mn = mt = m )

    (beta) ß = 0 -> cos 0 = 1 -> mt=mn/cos0 = mn/1 = m

    If ß > 0 = automatic mt

    x1 = profile postponement -> pinion = small gear
    x2 = profile postponement -> wheel = large gear

    Excuse please my "Google" English, but I have not enough time at the moment...
    .
     

    Attached Files:

    • Beta.jpg
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    • pins.jpg
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  11. indesign

    indesign Alibre Super User

    Very nice but I think you may missunderstand the request.

    I have customers who send prints with an involute where there is a dimension over pins. This pin is a cylinder placed in the teeth and measured over the outside. The other software we currently use is called mechanic and it was originally designed for wire edm cad/cam. The gear module is not provided with their newer software which means we can no longer update. :shock:
     
  12. Ralf

    Ralf Alibre Super User

    Ah Ok, yes I think I understand.
    I think it will already work.

    At this moment we are ready for 2D.
    But I will this Add-on => "have" in 2D and 3D with a new dialog box and with many input possibilities.
    2D for special geometry`s and 3D for the quick visualization.

    At the moment the dev. team has a lot of work, so we do not want to bother Travis... :wink: with our questions.
     
  13. Astro Scott

    Astro Scott New Member

    This looks very good! how soon before we see it :D . Will this have the ability to do helical gears?

    Best Regards,
    Scott
    2GB, GTX260, E8500 3.16GHz, Vista 32bit, AD V11
     
  14. drof34

    drof34 Member

    How about miter and /or bevel gears?

    Will motion ever have the ability to apply a motor to one gear which would drive another that is meshed with it?

    Jim W.
     
  15. Oldbelt

    Oldbelt Senior Member

    Yes mowing gear are possible.
    Helical is possible with three sketches in different planes and a loft.
    Look here

    regards Oldbelt

    Do it right first time.
     

    Attached Files:

  16. Oldbelt

    Oldbelt Senior Member

    Dear tchar

    See my parametric gear design at :

    download/file.php?id=4472

    I have used those templates for several gear designs.

    kind regards
    Oldbelt

    Do it right first time.
     
  17. protarawizard

    protarawizard Member

    Hi,
    Here is my "improved" version of the Spur Gear model posted by Oldbelt. This version has tried to "englishise" the wording plus has 4 "CONTROL" values in the EquationEditor to control the layout.

    Idea is by changing the values for "CONTROL_Module", "CONTROL_NumberOfTeeth", "CONTROL_PressureAngle", "CONTROL_ShaftDiameter", "CONTROL_ToothFaceWidth" the model will update to suit.
    In the project tree there are a couple of "suppressed" sketches; these (when enabled) change the model by trimming the teeth above the pitch circle; and/or adding in a pitch circle solid ring; both of which I found useful in assembly placement. That said, once I gained confidence the model was doing the right thing, I found all it was way better to add the "PitchCircleRadius" values (from the EquationEditor) for a pair of gears and applying the total to an AssemblyConstraint that set the distance between the shaft centers; this worked well and allowed movement of the likes of bearing blocks around in the Assemby while retaining the correct spacing.

    [Edit] I had another look at an assembly of mine that had a gear pair; my finding was that the spacing between the gears (in my projects anyways) was controlled by applying the distance (attained from adding the pair of "PitchCircleRadius" values) as a spacing of the shaft holes on the backing plate in the BackingPlate PRT file. The shaft holes in the gears are then aligned to the shaft holes in the backing plate within the assembly.

    [Edit] If the suppressed "PitchCircleFace" objects in the Gear PRT files are enabled then the Gears can be mated together using an OutsideTangent contraint in the Assembly. The gears will then happily roll around each other if dragged within the assembly.

    [​IMG]

    Cheers,
    Norman
     

    Attached Files:

  18. RCH_Projects

    RCH_Projects Alibre Super User

  19. Oldbelt

    Oldbelt Senior Member

    Hi Norman
    Well done.
     
  20. protarawizard

    protarawizard Member

    Here is a simple assembly with backing plate and a pair of gears. Control of the spacing between the gears (in this example) is performed by spacing of the shaft holes in the backing plate.

    [​IMG]

    Cheers,
    Norman
     

    Attached Files:

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